Automatic circuit-breaker.



.11. (1 1P111NEY11 0.1:. SIMMONS. AUTOMATIC GIRGUIT'BRBAKER.

APPLICATION FILED 00T.10. 1908.

2 SHEETS-TSHEBT 1.

v @j f L 'l' atta/mq;

E. C. RANEY & C. E. SIMMONS. AUTOMATIC CIRCUIT BRBAKER. APPLICATIONFILED QoT.1o.19os.

2 SHEETS-SHEET n.

1,005,575, Patented Oct. 10, 1911.

UNITED srarns PArEN'r ernten.

ESTELLE C'. RANEY, 0F CROOKSVILLE, AND CHARLES E. SIMMONS, OF STEUBENVILLE, OHIO. I

AUTOMATIC CIRCUIT-BREAKER.

Specification of Letters Patent.

Patented Oct.. 16, 1911..

v To all whom it may concern:

Be it known that we, (l) EsrELLE C. RANEY and (2) CHARLES E. SIMMONS,citizens of the United States of America, residing at (l) Crooksvilleand (2) Steubenville, in the counties of (l) Perry and (2) Jefferson,State of Ohio, have invented certain new and useful Improvements inAutomatic Circuit-Breakers, of which the following is a specification,reference being had therein to the accompanying drawing.

This invention relates to automatic circuit breakers, andthe object ofour invention is to provide a switch which will open the circuit onoverload or when short circuited, and

close the circuit automatically when the overload 'or short circuit isremoved.

To this end we have devised a novel apparatus that can be used inconnection with parallel generator work or within a motor circuit witheither alternating or directI current, the apparatus being simple inconstruction, positive in action and highly elicient for controllingcircuits that are liable to be overloaded or short circuited.

` Our invention will be hereinafter more fully described and thenspecifically claimed.

Referring to the drawings, Figure 1 is a diagrammatic View of ourapparatus in connection with a motor circuit, and Fig. 2 is a similarview of the vapparatus used in connection with parallellgenerator work.

In the drawings, 1 designates a generator having feed lines 2 and 3.Connecting with the feed line 2 is a wire 4 constituting one of thecircuit wires of a motor or any other load. The other circuit wire 5 isconnected to a contact 6, which is engaged by a main switch 7 adapted toengage another contact 8. The contact 8 is connected by a wire 9 with anoverload coil l0 and this overload coil is connected by a wire 11 to thefeed line 3.

The main switch 7 is carried by the core 12 of an operating solenoid 13,said solenoid being connected by a wire 14 to a manually operated switch15, and by a wire 16 to a contact 17. Associated with the contact 17 isanother contact 18 which is connected by a. wire 19 to the switch 15.The switch 15 is connected with the feed lines 2 and 3 through themedium of wires 20 and 21.

The contacts 17 and 18 are adapted to be connected by an overload switch22carried by the plunger of a dash pot 24, said plunger having cores 23extending through a holding coil 25 and the overload coil 10 and connected by a rod A23. The holding coil vis connected by a wire 26 to thewire 77 and by a wire 27 to a resistance 28. |The resistance 28 isconnected by a wire 29 to a contact 29. A wire 3l connected to the motorcircuit wire 5 is connected to a contact 31 whichv contacts 29 and 3lare adapted to be bridged by a yoke 30 on the main switch 7. VVhen thegenerator 1 is started, the hand switch l5 is closed to energize thesolenoid 13 and raise the switch 7 to engage the contacts 6 and 8. Thecircuit is then through the feed line 2, motor circuit wires 4 and 5,contacts 6 and 8 by the switch 7 to the overload coil 10, and by wire 11to the feed line 3.

' ln case of an overload, or a short circuit, as designated by a dottedline 32, vthe dashpot plunger is raised by the overload coil 10, openingthe circuit between the contacts 17 and 18, breaking the circuit throughthe solenoid 13 and allowing the switch 7 to descend and the yoke 30 toengage t-he contacts 29 and 31. The circuit is then through the wires 31and 29, resistance 28 to the holding coil 25, and by wires 26 and 11 tothe feed line 3. After a load has assumed its normal condition, or shortcircuit removed, the contacts 17 and 18 are again bridged as a result ofthe current in coil 25 being reducedl and the circuits are restablishe if The dash-pot 24 is primarily to retard the closing or bridging of thecontacts 17 land 18 until core 12 has had time to fall and establish acircuit through switch 7 yoke 30 and coil 25, and the operation of theclosing of contacts 17 and 18 is regulated through the medium of theholding coil 25.

In connection with the above circuits, it

will be observed that the switch 22 and cores 23 matic switch controlledand the holding coil.

contacts 17 and 18, constitute an autoby the overload coil coil 51. Theautomatic switch is v operation, are closed,

bus bars 33 an nected by wires 35 and 36 to generators 37 and 38, vsaidgenerators being connected by wires 39 and 40 to contacts 41 and 42, andby wires 43 and 44 to contacts 45 and 46 respectively. Associated withthe contacts 45 and 46 are contacts 47 and 48, the former beingconnected by a wire 49 to the wire 44, while the latter is connected bya wire 50 to a holding coil 51,-which is connected by' a wire 52 to aresistance 53 connecting with the bus bar 34. Associated with thecontacts 41 and 42'are contacts 54 and 55, these contacts beingconnected to overload coils 56 and 57 that are connected to the bus bar34 by Wires 58 and 59. The circuits through the contacts 41, 54, 45, 47,42, 55, 46, and 48 are controlled by switches 60 and 61 actuated byoperating solenoids 62 and 63 in circuit with manually operated switches64 and 65. In connection with the switches 67 the former being connectedto the wires 35 and 39, by wires 68 and 69 to the switches 64 and 65, bya wire 70 to an automatic switch 71 opened and closed by the holdingconnected to another switch 72 by a wire 73, and the switch 72 isconnected by a wire 74 to still another switch 75, which is connected bywires 7 6 and 77 to the switches 64 and 65. The switches 72 and 75 areactuated by the overload coils 56 and 57 in conjunction with dash-pots78 and 79. Switch 67 is connected to the wires 36 and 40, and by wires8O and 81 to the wires 68 and 70.

When one of the generators is operated, its own switch 66 or 67 andmagnet switch 64 or 65, according to which generator is in but when thegenerators are operated in parallel, it is only necessary to closeeither or both of the switches 66 or 67 and the switches 64 or 65.

With the genera-tors operated in parallel, the circuit for the currentof the generator 37 for operating the automatic switchesl is throughwire 39,V switch 66 to wires 70, through the automatic switch 71, bywires 73 to switch 72, through wires 7 4to switch 75, through` .wire76by wire 77, to switch 64, through solenoid 62 by wire 69, to wire, 68,and to the wire 35 by4 switch 66. Alsosolenoid 63 is in parallel withsolenoid 62 across the wires 68 and 76. f

In energizing the solenoid 62, the switch 60 is elevated and the circuitis through the bus bars 33 and 34by wires 35 and 58. In case of anoverload, the circuit is broken at the switch 75 which is actuated bythe overload coil 56. The breaking of this circuit denergizes solenoidI62 andallows the switch 60 to descend. The circuit is then 64 and 65.we use manually operated switches 66 and contacts 45 and 47, wire 46 and48, wire 50 to the 52 to the resistance 53 through wire 43, 49 to thecontacts holding coil 51, wire which is connected to the bus bar 34.

Since solenoid 63 and switch 72 are in circuit with solenoid 62, switch75 and generator 38, the overloading or short'circuiting of the bus bars33 and 34 can be readily controlled when the generators 37 and 38 areoperated in parallel. A.

It will be observed that we have devised a novel reclosing circuitbreaker, which upon opening by overload, closes another circuit whichwill automatically close the breaker at the proper time.

An important feature of the circuit breaker resides in the fact thatwhen `the bridge 7 (Fig. 1) descends on account of an overload, there isanother circuit estab'- I lished from wire 4 through the short circuitor overload 32, to wires 5 and 31, yoke 30, wire 29, resistance 28, wire27, coil 25, wires 26 and 11 to the line 3. The coil 25 is adjustedwhereby when there is a short circuit, enough current will flow throughthe resistance 28 and coil 25 to hold contacts 22 and 18 open, butwhenever the resistance of the other circuit or overload is increased toany desired amount, the coil 25 will allow contacts 22 and 18 to closethe main circuit vthrough solenoid 13.

In connection with the parallel operation of generators, it will beobserved that all circuit breakers can be closed simultaneously by lirstclosing switches 64 and 65, then upon 67, the breakers closing eitherswitch 66 or are both energized' at once.

It is thought from the wiring shown in Fig. 2 that the other currentswill be fully understood, and while we have not shown the specificconstruction in connection with the overload coils, and adjustablecircuit closing coils, we reserve the right to select 4coils suitablefor this purpose.

Having now described our invention, what we claim as new, is

1. In an electrical distribution system, a generator, feed lines, amotor circuit, a main switch, an operating solenoid for said mainswitch, a circuit for said solenoid, said solenoid controlled by saidmotor circuit, an overload switch in the circuit of said solenoid andcontrolled by said motor circuit,

a holding coil coperating with said overload switch and controlled by a`shunt circuit, a retardingdevice for said overload switch, said oneposition to close the main circuit when in another position to close theshunt circuit.

2. I n an electrical distribution system, feed lines, motor circuits,main switches, operating solenoids for said main switches, circuits forsaid solenoids, said solenoids conmain switch serving when in v trolledby said motor circuits, shunt circuits connected to said motor circuits,overload switches in the circuits of said. solenoids,

holding-coils in coperative relation with said overload switches,contacts normally bridged by said main switches to close the motorcircuits when said operating solenoids are energized, and auxiliarycontacts in said shunt circuits adapted to be bridged by said mainswitches when said solenoids are de- 10 energized.

In testimony whereof We affix our signatures in the presence of twoWitnesses.

ESTELLE C. RANEY. CHARLES E. SIMMONS. Witnesses:

MAX H. SRoLovrrz, C. V. BRooKs.

